In a 5-4 decision, justices said two exhibits in Kentucky courthouses crossed the line between separation of church and state because they promote a religious message.
Grayson County was forced to remove its copy of the Commandments three years ago. But many residents say they never imagined the nation's highest court would stop the community from hanging them back up.
"I'm just disappointed in our leaders and our officials. They are throwing away the foundation to our faith. Maybe we just need to pray harder for them."
"I'm saddened by this decision, and worried about the direction in which our country is headed."
A group supporting the Ten Commandments have put up billboards around Grayson County, to let the community know they still support them. Around 120 businesses have followed their lead and already placed copies of the Ten Commandments on their walls.
"We are all Christians here and proud of that."
The Supreme Court says posting the Ten Commandments in courthouses should be resolved on a case by case basis.
While justices found Kentucky courthouse exhibits did cross the line between church and state, they ruled a monument at the Texas Capitol did not, because it promotes a historical, not religious, message.